separate incidents.. And that's prompting a warning tonight about some popular but UNSANCTIONE D trails... KITV4's Lara Yamada has the latest developments in BOTH Oahu hiking deaths... The medical examiner's office says 70 year old Paul Yoon died of crainial and cervical spine injuries on Sunday. His friends say he was very active: hiking, cycling and loved playing pingpong - but they say they also witnessed a number of slips and falls during the 10 months with their hiking club. The last... ending tragically. AILA 328 No trail is worth dying for. The higher-than-a bird's eye view -- of some of the most stunning sights on earth. The lure of Hawaii's lush and majestic hiking trails is attracting more people and risking more lives. AILA 302-10 The mountains are very friable. They are eroding and so you have a narrow path and people need to understand it really may not be all that stable. On Sunday 70 year old Paul Yoon was hiking Mariner's Ridge Trail with the Honolulu Korean Hikers Club. Witnesses say the group reached the top, then went off the beaten path, when Yoon slipped and fell about 30-feet. He died on the way to the hospital. NANA SUN PKG: 1900-10 The whole thing happened in slow motion. I remember seeing her go over and seeing her face while she was going down the side. And on Saturday, Aaron McClendon says his friend 23- year old Elizabeth Tarpey slipped on a loose patch of soil, and fell 300-feet off Pu'u Mana-mana hiking trail in Kaaawa. It took rescue crews five attempts to reach her on the jagged, dense mountain side. NATS: Thank you! CREW: This isn't an isolated thing. This is becoming more and more frequent! The day-long rescue of more than 50 hikers on Kauai's Kalalau Trail recently highlighted the increasing calls and dangers to crews -- Aia says - that hunger for outdoor excitement fueled by the endless clips and pics online. AILA 150-58 I think the difference between now and 10 years ago is there are more people that are wanting to do extreme sports and you take the risk you do that. At the time of their accidents, Aila says Yoon and Tarpey were both on parts of hiking trails NOT sanctioned or maintained by the state. The medical examiner says Tarpey died on Sunday of multiple internal injuries -- her parents are flying in from the mainland. Yoon is survived by his wife and two daugthers -- who are also flying in. On a separate note -- we've just learned of another fall - this time on the Big Island. Big Island Fire says a man fell off Rainbow Falls today. He was medi-vaced to Oahu with serious injuries.

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